Following this morning’s funeral service, SHINee’s Key has shared a sweet handwritten letter dedicated to Jonghyun as part of an emotional Instagram post.

Posting the photo alongside a ring from a bracelet set gifted to him by Jonghyun, he apologised to the late singer — who he often referred to as a brother — for not being “a source of strength” during his loneliness.

The emotional note continues to promise that he will “respect and look after” Jonghyun’s mother and sister like his own family.

Key was one of the chief mourners at today’s funeral, December 21, alongside the other SHINee band members Onew, Taemin and Minho.

Reach the touching tribute below.

“To Jonghyun hyung who I love,
Hyung, this is Kibum. I sent you off today and saw your face yesterday, but I still can’t believe it. I’m sorry for visiting you so late because of work, and I’m sorry I wasn’t a source of strength when you were lonely.
You and I were the two most stubborn members of our group, so we had to do everything we wanted to do. You did everthing you wanted, and in the end, you made the decision and left us first… it was really hard at first, but after spending time with only you for the past three days, I think I understand how you felt.
Don’t be too worried that you left before us. I’ll respect and look after your mom and sister like my own family.
I’ll miss you for a very long time. I’m worried because the person who always took my side at meetings is gone now. You and I talked the most during our meetings… I’ll have to get used to not having you here now.
I’m going to try living a better life too. When I get older and meet you again, tell me I did well. Jonghyun hyung, you were the best artist, friend, hyung, and colleague to me.
You worked hard, and I love you so much!”